CVE-2021-47964

Schlix CMS 2.2.6-6 Remote Code Execution via core.blockmanager

CVSS 8.7 HIGHEPSS 0.7%CWE-94

Vexday Risk Score

41Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 8.7EPSS 0.7%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

15 May 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

Schlix CMS 2.2.6-6 contains a remote code execution vulnerability that allows authenticated attackers to execute arbitrary PHP code by uploading malicious extension packages through the block manager. Attackers can upload a crafted ZIP file containing PHP code in the packageinfo.inc file and trigger execution by accessing the About tab of the installed extension.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected products

Schlix · Schlix CMS

public PoCs found — 1

cve_referencewww.exploit-db.com/exploits/49838unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

https://www.exploit-db.com/exploits/49838 https://www.schlix.com/https://www.schlix.com/downloads/schlix-cms/schlix-cms-v2.2.6-6.zip https://www.vulncheck.com/advisories/schlix-cms-6-remote-code-execution-via-core-blockmanager